Electrodeposition of Cobalt‐Copper Oxides Decorated with Conductive Polymer for Supercapacitor Electrodes with High Stability. Issue 11 (1st June 2022)

• Record Type: Journal Article
• Authors: Noormohammadi, E.; Poli, F.; Durante, C.; Lunardon, M.; Sanjabi, S.; Soavi, F.
• Is Part Of: ChemElectroChem. Volume 9:Issue 11(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-01
• Subjects: Cobalt-copper oxides -- Conductive polymer -- Cycling stability -- Electrodeposition -- PEDOT:PSS -- Supercapacitor electrode; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202200102
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: Here, we report about the synthesis of Cobalt‐Copper (CC) mixed oxides prepared by electrodeposition and thermal annealing, and coated with PEDOT:PSS (CCP) for supercapacitor electrodes. The electrodes' morphology and electrochemical performance were investigated by combining XRD, XPS, SEM, cyclic voltammetry, and galvanostatic charge/discharge tests. The initial capacity of the CC electrode was 26 mAh/g at a scan rate of 5 mV/s with a coulombic efficiency of 92 %. The CC electrode featured a capacity retention of 81 % at a constant current density of 1 A/g after 5000 cycles. CCP electrodes slightly reduced the specific capacity but increased both coulombic efficiency and cyclic stability. CCP1 electrode featured a specific capacity of 21 mAh/g at 5 mV/s scan rate with better coulombic efficiency 95 % along with capacity retention of 92.3 % over 5000 cycles. Increasing the amount of PEDOT:PSS lowered the CC electrodes' specific capacity, but significantly improved the capacity retention up to 100 %. Abstract : The effect of PEDOT:PSS on the cyclic stability of cobalt‐copper mixed oxides synthesized by electrochemical deposition has been studied. Electrodes containing PEDOT:PSS exhibited a capacity retention that increased with the amount of PEDOT:PSS, from 92 % up to 100 %. Cobalt‐copper mixed oxides electrode retained only 81 % of its initial capacity after 5000 cycles. Increasing PEDOT:PSS significantly improved the cyclic stability and capacity retention after 5000 cycles up to 100 %.